conjecture
noun
the formation or expression of an opinion or theory without sufficient evidence for proof.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hitherto the London about which we have been conjecturing has been a mere cloud city.
From Old and New London Volume I by Walter Thornbury